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Finding the Fourth Proportional to 612.38, 845.08 and 336.38

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Solution

The fourth proportional to 612.38, 845.08 and 336.38 is: 464.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.38 : 845.08 = 336.38 : x
  2. Step 2: Convert to fraction form
    612.38/845.08 = 336.38/x
  3. Step 3: Cross multiply
    612.38x = 845.08 × 336.38
  4. Step 4: Simplify right side
    612.38x = 284,262.94
  5. Step 5: Solve for x
    x = 284,262.94/612.38
  6. Step 6: Final answer
    x = 464.20

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Double scale
Find fourth proportional to 613.38, 846.46 and 337.38
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.